Name:Juckso PaK
Precalculus Quiz 2.3-2.4
.
Write the list of possible rational zeros for the following function. DO NOT FIND THE ZEROS.
1,'
S,'lo
S)=3r+4r-2+ 10
1,'2 5, T1o, "
',
2. Use Descartes' rule of signs to predict the number of positive real zeros and the number of negative real
zeros.
h (x) 7x-54r- 12x4 +4r3-2r2+5
=
#
positive real zeros
2
# negative real zeros
0
h-): 7 ) s l ) - 12-.)" q.) 2(.)*
hl
7-5
-25
-12-
3. Find all of the zeros for flx) =r-2r-14x-5
5
2)
2
-3
2
3
f)=(, 13,
)
O-))(,-(15)(..;)
ttros
S
2
Name:Jkson Fa ik
Procalculus Quiz 2.3-2.4
4.
Write a 3d degree polynomial function with zero's 2i and
(,
2:(,.2:)(7.
G1
5. Divide
-
21
(x+2x*-5) (x -3)
O3)
-
O
-3)
24
-
s
Dx )
6. Find the zero's ofthe function and state the multiplicities. gtr)= 2r +9x*+7
(HINT: Factor!)
2 , 9"7
2, -i, 7)
)
(2,
0
-1)(y1)
(2.7)1)
nult
3
7. Explain why the number 7 cannot be a rational zero of the polynomial flr)
Araioncl
uhe
ero
must be
not.
in
tlu
form of
Fachor
2
+5-x+6
Constant
Fattoo{ hainsoA.ie